Windmill.



S. S. HARPER, DECD.

1:. L. HARPER, EXEUUTRIX.

- WINDMILL.

APPLICATION FILED JULY 15,1913.

2 SHEETS-SHEET 1.

Patented Nov. 24,

S. S. HARPER, DEG'D. 1:51.. HARPER, EXEOUTBIX.

WINDMILL.

nruou'mn rum) JULY 15, 1913.

1,1 18,343. Patented Nov. 24, 1914.

2 SHEETS-$112121 2.

THE NORRIS PETERS C0 PHOTO LITHL WASH/NU run. I) l:

UNITE %TATEE PATENT OFFICE.

SAMUEL S. HARPER, DECEASED, LATE OF NEW YORK, N. Y., BY ELEANOR L.HARPER,

EXECU'IRIX, or new rear, n. Y.,

ASSIGNOR TO AIR TURBINE COMPANYOF or new Jnnse r.

WINDMILL.

Application filed July 15, 1913.

To all whom it may concern Be it known that 1, ELEANOR L. Ilanrnn, acitizen of the United States, residing in the borough of lVlanhattan,city, county, and State of New York, executrix of the last will andtestament of Senora. S. Ilinrnn, deceased, late of the borough ofh'lanhattan, city, county, and State of New York, do hereby declare thefollowing to be full, clear, and exact description of the invention ofthe said Samurai. 5. llanrnn of an Improvement in Windmills, such aswill enable others skilled in the art to which it pertains to make anduse the same.

This invention relates to windmills of the general type disclosed in theapplication for patent of Samuel S. Harper, tiled February 23, 1909,Serial No. 179,508. In this form of wind-mill, there is a vertical.suaft carrying a cage, in which is supported a plurality of vanes. Suchvanes are mounted upon vertical pivots, and swing inward and outward bythe pressure of the wind. A device is provided for guiding the vanes andlimiting their movement.

The present invention relates to improvements of this device.

The objects of the invention are to simplify the structure, reduce wearand render the guiding and limiting device independent of the shaft.These and further objects will more fully appear from the followingspecification and accompanying drawings,

considered together or separately.

In the drawings,Figure 1. is an elevation of a Wind-mill embodying theinvention. Fig. 2 is a sectional view of the same looking downward, thesection being taken on the line 2-42 of Fig. 1. Fig. 3 is a plan Viewpartly in section. of a modification of the ring for determining theposition and extent of the movement of the vanes; and Fig. 4 is a detailview of a fin-their modification.

In all of the views, like parts are designated by the same referencecl'mracters.

Referring to Fig. 1, it will be seen that the wind-mill is su 'iportedupon a shaft 1, which is vertical. A plurality of vanes 2-2 areconnected by pivots 3 to upper and lower rims 1, 1. These rims areconnected to Specification of Letters Patent.

Patented Nov. 2 1, 1914:.

Serial No. 779,079.

and supported from the shaft 1 by means of spokes 5, 5 engaging\vithhubs (S, (5. This form of mill is generally shown in the copendingapplication, before referred to.

The device for controlling the position of the vanes consists of a ring7. This ring, as shown, surrounds the shaft 1, and is connected to andis supported by the vanes 2, 2. On the ring 7, and adjacent to each vaneis a supporting link 8, mountedto turn on the ring, and connected to thering by bearings t). These links are preferably connected andproportioned, as shown, so that they will produce 1. rigid support forthe rin For the purpose of stiffening the ring and preventing it fromcollapsing, and at the same time to allow it to be made as light aspossible, it is provided with spokes 10, 10, which preferably cross itin the manner illustrated, so that a cent'al open space is providedthrough which the shaft 1 passes.

The ring is of such a size that it will come in contact with the pivotededges of the vanes when the latter are swung out to the maximum extent,as shown in the upper left-hand portion of Fig. 2. \Vhen the ring is inthis position, the vanes shown at the lower part of the figure willswing inward to the maximum extent.

For the purpose of imparting tension to the spokes 10, the device shownin Figs. 1 and 3 may be used. In accordance with this embodiment of theinvention, the spokes 10 are connected to annular hubs 11., 11, thesehubs surrounding the shaft 1. The internal opening in the hubs issulliciently large so that their inner edges never come in contact withthe shaft. The spokes 10, 10 are connected to the hubs, as shown in Fig.1, and these hubs are separated by means of stay-bolts 12, 12. Three ofthese bolts are shown in Fig. 2. The ends of these bolts are threaded,as shown, the threads being of opposite pitch at the two ends, and thecentral part of the bolt is preferably squared for the application of awrench. By rotating the bolts, the hubs are separated, and the requisiteamount of tension is imparted to the spokes 10, 10.

Fig. 3 represents a modification in which the hubs 11, 11 are not used,the spokes extending directly from one side of the ring to the other.The ends of the spokes are shown as provided with nuts, by means ofwhich the tension may be applied to them.

Fig. i represents still another modification, in which the spokes arearranged in the manner as shown in Fig. 3, and are provided with turnbuckles, by means of which the necessary amount of tension may beimparted to them.

From the foregoing specification, it is apparent that by this inventionthere is produced a very simple and eificient device for governing theposition of the vanes. The vanes will incline in the direction of thewind so as to produce the most effective con version of the windpressure into rotating forces. At the same time, the structure is simpleand does not easily get out of order,

. and the only wear that occurs is between the outer end of the ring 7and the pivoted edges of the vanes 2 and the connections between thelinks 8 and their supporting bearings.

While there is shown in the drawings as an embodiment of the inventionillustrated, a single ring "7 secured to approximately the center of thevanes 2, it must be understood that the invention is not limited to theprecise number of rings that are used, or to the position thereof.

In accordance with the provisions of the patent statutes, I havedescribed the principle of the invention, together with the apparatuswhich I now consider to represent the best embodiment thereof; but Idesire to have it understood that the apparatus shown is merelyillustrative and that the invention may be carried out inother ways.

Having now described the invention of the said SAMUEL S. HARPER, what Iclaim as new and desire to secure by Letters Patent, is

1. A wind mill having a plurality of ver tical pivoted vanes, a cage forsupporting the same and, aring connected to the vanes and supportedthereby, said ring, by its engagement with the vanes, limiting anddetermining the extent of movement of the vanes.

12. A wind mill having a vertical shaft, a cage. thereon, vanes pivotedupon vertical axes within the cage, a ring, connections between the ringand the vanes, these connections being the sole support for the ring,said ring, by its engagement with the vanes, limiting and determiningthe extent ofmovement of the vanes, cross members connecting the ring atopposite sides and means for imparting tension to such cross members.

8. A wind mill having a central supporting shaft, rims secured to theshaft and supported thereby, a plurality of vertical vanes pivoted tothe rims, the pivot being adjacent to one edge of a vane, a ringsurrounding the shaft, supports for the ring carried by the vanes, saidring, by its engagement with the vanes, limitingand determining theextent of movement'of the vanes, spokes extending across from side toside of the ring, and leaving a central opening for the movement of thering around the shaft, and devices fer exerting stress upon the spokes.

This specification signed and witnessed this 30th day of April, 1913.

ELEANOR L. HARPER, Executria; 0 the last will and testament of Samuel S.Harper, deceased. Witnesses GEORGE JARVIS THOMPSON, NATHAN H; LORD.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents.

Washington, D. C.

